Radial-drill-base construction



Dec. 9, 1924.

, D. C. KLAUSMEYER RADIAL DRILL BASE CONSTRUCTION Filed Nov. 8, 1921 2 Sheets-$110M 2 Patented Dec. 9, 1924.

UNITED STATES ?ATENT DE'FIQEE...

DAVID C. KLAUSMEYER, 0F CINCINNATI, OHIO, ASSIGNOR TO THE GINCINNATZ BICK- FOB/D TOOL COMRANY, OF CINCINNATI, 03311 3, A GORPQRATEON OF OHIO.

RADIAL-DRILL-BASE CGNSTR-UCTIQN.

Application filed November 8, 1921. Serial No. 513,638.

To all whom it may concern:

Be itknown that I, DAVID C. KLAUsMnrnn, a citizen of the United States. and residing at Cincinnati, in the county of Hamilton and State of Ohio. have invented a new and Improved Radial-Drill-Base Construction, of which the following specification is a full disclosure.

This invention relates to the structure of the bed or base of a radial-drill and it involves improvements in the means for anchoring the same to its foundation; which is usually formed of concrete.

A radial-drill has a bed of considerable size on which is usually placed the articles to be drilled, and the drill point is supported by an arm which radiates from an upright post rigidly bolted to the base. It will be seen that this organization, from the standpoint of its stresses and strains, has many of the characteristics of a jaw-clamp and, as heretofore designed. such machines are selfcontained in the sense of meeting the strains entirely through the structural formations and dimensions of its parts. In order that the machine may be securely retained in place and properly mounted. its base was habitually provided at peripeheral or mar ginal points (usually at its fourcornersl with lugs perforated to receive bolts which are. at their lower ends. secured appropriatelv in the concrete or other foundation utilized to support. the machine. When in use, such machines have always manifested. a more or less pronounced deflection of the post under verv severe drilling" operations and. in an effort to over-come this inaccuracv. the lower end of the post and also the base have been strongly reinforced in various ways and various different constructions have been proposed to minimize this deflection. Nevertheless by reason of the limited dimensions available for the base at its juncture adiacent the post and because of the limited amount of metal available under commercial conditions. this weakness was never satisfactorilyeliminated.

Instead of seeking to cure the trouble by employing a materially greater amountof metal in the base. or by resorting to further complications in the formation of the base and its attachment to the post this invention. proposes an improvement in the manner of bolting the base to its foundation whereby stresses, in excess of those which the mas chine alone can resist without being unduly strained, will be borne by tension bolts appropriately affixed at their lower ends in the foundation and terminating at their upper ends in adjustable nuts located and arranged to press downwardly against upper portions of the base adjacent the forward side of the iunction between the post and base where the stresses are most pronounced. When the post is urged backwardly by the upward. pressure of the drill against the radial arm. the tendency is for the post to over turn about its rear edge and to lift up the portion of the bed immedr atelv adiacent its front side and it is the object of these bolts to resist this uplifting" tendency and correspondingly to brace the reinforced bed against bending at this point. At the same time. these bolts operate to assist the conventional bolts in holding the machine against shifting on its foundation.

This invention also aims to improve the structure of the bed to give it the greatest rigidity possible. consistent with an economical use of metal and, more especially to so fashion it at its iuncture with the post that the tension and compression between the post and the bed will be effectively resisted. In other words, in coniunction with the above-mentioned foundation tensionbolts, it is proposed to provide a svstem of bed-reinforcement at the point of its connection through bolts with the post. whereby the tendency of the rear edge of the post to depress the top-fzwe of the bed will be resisted by a stint-like nart of the bed servinrr to convey the downward pressure directly against the foundation. and whereby the tendency of the front edge of the post to up-lift the roof of the bed will be resisted by the entire depth of the bed: the pull on the bolts being transmitted. so to speak to the lowermost face of the bed so that the entire section (instead of merely the roofl will act to resist the pull. As before stated. the foundation bolts serve to resist this pull by also acting); through the entire section of the bed.

Other obiects and advantages will be in part indicated in the following): description and in part rendered apparent therefrom in connection With the annexed drawings.

To enable others skilled in the artso fully to apprehend. the underlying features hereof that they may embody the same in the various Ways contemplated by this invention, drawings depicting a preferred typical construction have been annexed as a part of this disclosure and, in such drawings, like characters of reference denote correspond-- ing parts throughout all the views, of which Fig. 1 is a fragmentary side elevation of a radial-drill embodying this improvement. Fig. 2 is a plan of a base embody ing the tension elements located and arranged in accordance with this invention. Fig. 3 is a vert'cal fragmentary section detailing one of the various possible ways of utilizing the tension elements. Fig. l is a vertical section showing a reinforcement in the connection between the base and the post affording greater resistance against deflection. Fig. 5 represents a preferred alternative of this improvement. an under-view of the bed showing its integra-l' reinforcements for the purpose of at taining a high degree of rigidity.

Referring to the drawings, A indicates the base or bed of a radial-dull which also comprises a post B on which is rotatably mounted a sleeve C from which radiates an arm D carrying a drill-head E from which downwardly projects a spindle F carrying the usual drill-point G. The arrows 1 and 2 indicate the opposing forces acting on the machine when the drill is being forced into its work. The effect of these forces is to urge the forward edge of the post upwardly, as indicated by the arrow 3, and to urge its rear edge (:lownwardly as indicated by the arrow 4. Ordinar ly, the bed A of a radialdrill is constructed box-like in form so as to provide a level work-ing surface a on which the castings to be drilled may be sup ported; the section providing this surface being necessarily relatively thin compared with the full depth of the bed and forming a roof, so to speak, for the bed. The bed is conventionally closed around its s des by side-walls A. which are usually more or less flanged at their lowermost edges and such flanges serve to support the bed on its foundation of concrete. These side walls,

at their corners, are habitually supplied withconvent onal lugs 10, 11, 12 and 13 Wl'lltZll. are perforated and are intended to receive the usual bolts employed for boldingthe machine in place on its foundation. These lugs, being in the nature of comparatively th n ears, play no part in reinforcingthe bed but merely serve to hold it agalnst lateral displacement. In certain previous constructions, the post B was pro vided with a flange b which, by means of bolts 5,- Was securedto the roof of the bed. The effect of that arrangement was to create a certain amount. of give by'reason of the fact that the roof had a tendency to bend or buckle. To, overcome this bending, 061'.

l a I Q Fig. 6 iepi esents tain cross ribs 6 were proposed but they did not answer all. of the requirements because the lower heads of the bolts rested directly against the underface or ceiling of the roof (or else the bolts were threaded directly into the roof) and the roof was there fore free to yield slightly in the immediate vicinity of the bolts.

According to. this invention, the bed is not only provided with a roof but is also provided With a floor as shown best by 6. This floor, indicated by a", preferably cast integral with the bed and hasan opcir' work formation so as to savemetal and-raise: to permit the removal of the cores used in casting. It is proposed, by the present construction, to extend the metal integrally/in the form of ribs, illars or struts 7 and 8 from the floor to t e roof in the re 'ion immediately underlying the several olts 5: the object being to cause both the roofand the floor to share in carrying: the stresses and thus relieve the roof from alone cari ving such stresses as result from the tendency of the post to'tilt. In the form shown by Fig. 4., the bolt is screw-threaded through the roof into the upper end of'thepillar 7; while in the form shown by'Fig. 5", the bolt is made sufficiently long to extend into a screw-threaded connection with the floor in thestrut becomes a compressionlelement and serves to transmit the-pressure immediately against the concrete foundation and thusef'fectively resist the overturn ofthepost irrespectively of the ability of the roof or the floor alone to resist deflection. VVhenthe structure is used at the front edge of the post. the tendency is tobend both the roof and the floor upwardly (thestrut seru ing to distribute the stresses) and the overturn of the post will be resisted therefore only by the rigidity of the bed.

To overcome this last mentioned weaknessinherent in every structure of thisnature, it is proposed to locate tensionrbolts H adjacent the forward edge ofthe post. Prefer,- ably these bolts will be symmetrically arranged, as indicated by Fig. 2 and any nunrber may be used but, ordinarily, it will suffice to employ two-if located about asshown.

The lower ends of: these bolts are anchored is apertured to receive the shank of the bolt. The effect of these bolts is to hold the entire bed section down against being bent upwardly by the bolts securing the front edge of the post to the bed; thereby utilizing the concrete foundation as a special element for cooperating with the section of the bed immediately in advance of the post in resisting deflection of the bolts.

Although exceedingly simple, it will be perceived that the arrangement above disclosed will materially reduce the tendency of the post to deflect under heavy drillingoperations and that, by utilizing this invention, it is possible to perform work which would create stresses in excess of the carrying capacity of a bed constructed in the same manner but connected to the post in a conventional manner and devoid of the cooperation of the tension bolts above de scribed.

lVithout further analysis, the foregoing will so fully reveal the gist of this invention that others can, by applying current knowledge, readily adapt it for various utilizations by retaining one or more of the essential characteristics of either the generic or specific aspects of this invention, and, therefore, such adaptations should be, and are intended to be, comprehended within the meaning and range of equivalency of the following claims.

Having thus revealed this invention, I claim as new and desire to secure the following combinations and elements, or equivalents thereof, by Letters Patent of the United States 1. A radial drill combining a box type bed comprising integrally formed roof, side-wall and floor sections; a post supported upon said roof section; bolts securing said post to said bed; struts adjacent said bolts and connecting said roof and floor sections for distributing to both the roof and floor the weight of said post; additional. strengthening means, independent of said struts, connecting said roof and floor sections to distribute to both local strains in an upward direction caused by the tendency of the post to overturn under the pressure of the drill on the work; and anchor bolts secured in the foundation of the machine and engaging the roof section to prevent upward deflection of the bed intermediate its ends.

A radial drill combining a box-type bed comprising integrally formed roof, side wall and floor sections; a post bolted to one end of said bed: an arm projecting laterally from said post and normally overlying said bed; means for holding said bed against bodily upward and lateral movements; and means located adjacent the edge of said post to which the arm normally extends for holding said bed against upward local deflection; said last-named means comprising struts between roof and floor sections and a tension element having one end engaging said bed adjacent said struts and having its other end anchored in the foundation of the machine.

3. A radial drill combining a box-type base comprising integrally formed roof, side-wall and floor sections, a post secured upon the upper surface of said bed; reinforcing means connecting said roof and floor sections for distributing the stresses applied to the roof section by said post: and anchoring means for said bed cooperating with said reinforcing means adjacent the forward lower edge of said post to hold said bed against being locally deflected upwardly from its foundation.

4. A base for radial-drills comprising a roof section adapted to support the drill column; a floor section beneath that portion of the roof section adjacent the column; and strain-distributing means connecting said roof and floor sections for transmitting to the floor section a portion of the strain to which the roof section is subjected by the tendency of the column to overturn under the pressure of the drill on the work.

In witness whereof, I hereunto subscribe my name, as attested by the two subscribing witnesses. 7

DAVID C. KLAUSMEYER.

Witnesses C. C. SLETE, MAURICE MUELLER. 

